Yangtze River DeltaFor most of the past millennium until the Industrial Revolution, the Yangtze River Delta was the world’s leading economic region, and it has reclaimed its role as a key mega-region on the world stage [Winston Mok].With a combined GDP of $2.17 trillion, which is comparable to India, the Yangtze River Delta contains cities like Shanghai, Suzhou, Hangzhou, Wuxi, Ningbo, and Changzhou.

Pearl River DeltaWith a combined GDP of $1.89 trillion, which is comparable to Italy, the Pearl River Delta has cities like Hong Kong, Guangzhou, Shenzhen, Foshan, Dongguan, and Macao.

Beijing-TianjinWith a combined GDP of $1.14 trillion, which is comparable to Australia, this megaregion holds the two largest cities in northern China, Beijing, and Tianjin. The two cities are a 30-minute bullet train ride apart.